Using the Book of Destiny, the incarnation controlled or established the destiny of everything in this Great Thousand World--inuding mortals, nonliving things, objects and cultivators. When people with a talent for cultivation are born, their names will automatically appear in the book, and the incarnation will establish their destiny.
Each individual's destiny is different. For example, it could be as simple as they are destined to become a Supernatural Realm cultivator. Of course, just because someone is destined for such an accomplishment does not mean that they definitely can achieve it; this is not how destiny functions.
The cultivators have to work to achieve their destiny. They have to undergo arduous cultivation, temper themselves, and fight for resources. Now, as someone destined to become a Supernatural Realm cultivator, they will have a particular Luck to ensure they accomplish their goals.
